Geologic map of the south-central Sagavanirktok Quadrangle, North Slope, Alaska

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Frequently anticipated questions:


What does this data set describe?

Title:
Geologic map of the south-central Sagavanirktok Quadrangle, North Slope, Alaska
Abstract:
This geologic map and report present 1:63,360-scale geologic mapping of the south-central Sagavanirktok Quadrangle in northern Alaska. This area encompasses approximately 600 square miles in the northern foothills of the Brooks Range, and includes stratigraphic and structural elements important to understanding the oil and gas potential of Alaska's North Slope.
Supplemental_Information:
This digital data distribution package provides shapefiles and geodatabase that portray features presented in RI 2014-4. Field names and values are organized according to the NCGMP09 - Draft Standard Format for Digital Publication of Geologic Maps, Version 1.1 by the USGS National Cooperative Geologic Mapping Program (NCGMP). This metadata file lists the table names and field names used in the geodatabase. Table and field names in the shapefiles are truncated at 10 characters. The geodatabase and selected shapefiles provide the following features:
border: A polygon that encompasses the maximum geographic extent of the data observations.
ContactsAndFaults: Line features that depict faults and geologic contacts, NCGMP09 format.
GenericPoints: A point file that provides locations, symbology, and labels for point features other than geochronology, stations, or orientation points.
GeologicLines: Dikes, coal seams, ash beds, glacial features, anticline and syncline hinge-surface traces, and other kinds of key beds that do not participate in map-unit topology, NCGMP09 format.
MapUnitPolys: Polygons and associated annotations that record the distribution of mapped or interpreted geologic units, NCGMP09 format.
OrientationPoints: A point file that provides field station locations, symbology, and associated structure data (bedding attitudes, foliation attitudes, slip vectors measured at a point, etc.), NCGMP09 format.
  1. How should this data set be cited?

    Gillis, R.J., Decker, P.L., Wartes, M.A., Loveland, A.M., and Hubbard, T.D., 2014, Geologic map of the south-central Sagavanirktok Quadrangle, North Slope, Alaska: Report of Investigation RI 2014-4, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 24 p., 2 sheets, scale 1:63,360

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -149.681407
    East_Bounding_Coordinate: -148.172402
    North_Bounding_Coordinate: 69.515650
    South_Bounding_Coordinate: 68.984159

  3. What does it look like?

  4. Does the data set describe conditions during a particular time period?

    Beginning_Date: 2008
    Ending_Date: 2016
    Currentness_Reference: ground condition

  5. What is the general form of this data set?

    Geospatial_Data_Presentation_Form: report and digital data

  6. How does the data set represent geographic features?

    1. How are geographic features stored in the data set?

      This is a vector data set.

    2. What coordinate system is used to represent geographic features?

      Grid_Coordinate_System_Name: Universal Transverse Mercator
      Universal_Transverse_Mercator:
      UTM_Zone_Number: 6
      Transverse_Mercator:
      Scale_Factor_at_Central_Meridian: 0.999600
      Longitude_of_Central_Meridian: -147
      Latitude_of_Projection_Origin: 0
      False_Easting: 500000.000000
      False_Northing: 0

      Planar coordinates are encoded using coordinate pair
      Abscissae (x-coordinates) are specified to the nearest .00000001
      Ordinates (y-coordinates) are specified to the nearest .00000001
      Planar coordinates are specified in Meters

      The horizontal datum used is North American Datum of 1927.
      The ellipsoid used is Clarke 1866.
      The semi-major axis of the ellipsoid used is 6378206.40000000037.
      The flattening of the ellipsoid used is 1/294.978698199999997.

  7. How does the data set describe geographic features?

    border
    A polygon that encompasses the maximum geographic extent of the data observations. (Source: Alaska Division of Geological & Geophysical Surveys (DGGS).This table is organized according to the NCGMP09 - Draft Standard Format for Digital Publication of Geologic Maps, Version 1.1 by the USGS National Cooperative Geologic Mapping Program (NCGMP).)

    ContactsAndFaults
    Line features that depict faults and geologic contacts, NCGMP09 format. (Source: Alaska Division of Geological & Geophysical Surveys (DGGS).This table is organized according to the NCGMP09 - Draft Standard Format for Digital Publication of Geologic Maps, Version 1.1 by the USGS National Cooperative Geologic Mapping Program (NCGMP).)

    Type
    Type values specify the kind of features represented by a line, point, or polygon (Source: Alaska Division of Geological & Geophysical Surveys)

    Feature type(s): south vergent thrust fault, seismic data; north vergent thrust fault; north vergent thrust fault, seismic data; south vergent thrust fault; contact

    IsConcealed
    This is a flag to identify contacts and faults covered by overlying map units. (Source: Alaska Division of Geological & Geophysical Surveys)

    ValueDefinition
    NThe feature IS NOT covered by an overlying map unit.
    YThe feature IS covered by an overlying map unit.

    LocationConfidenceMeters
    Half-width in meters of positional uncertainty envelope; position is relative to other features in the data. A value of -9 indicates that this measure is not available. (Source: Alaska Division of Geological & Geophysical Surveys)

    Range of values
    Minimum:30
    Maximum:50
    Units:meters

    ExistenceConfidence
    Indicates the degree of confidence and/or certainty in the interpretation of a a feature's existence. (Source: Alaska Division of Geological & Geophysical Surveys)

    ValueDefinition
    certainIndicates that the author has sufficient observational and/or other supporting data to be reasonably confident in the scientific credibility of the interpretation of the feature. The level of certainty is specific to the map scale.

    IdentityConfidence
    Indicates degree of confidence in the identification and classification of the feature. (Source: Alaska Division of Geological & Geophysical Surveys)

    ValueDefinition
    certainIndicates that the author has sufficient observational and/or other supporting data to be reasonably confident in the scientific credibility of the interpretation of the feature. The level of certainty is specific to the map scale.
    questionableThe interpretation of the feature at the mapped scale fits the overall proposed geologic model but the extent and/or classification is questionable or uncertain due to insufficient observations and/or supporting data.

    Symbol
    References the symbol value that was assigned to the point. (Source: Alaska Division of Geological & Geophysical Surveys)

    Formal codeset
    Codeset Name:FGDC Digital Cartographic Standard for Geologic Map Symbolization; Appendix A. Geologic map symbols, colors, and patterns, "REF NO" field
    Codeset Source:Federal Geographic Data Committee [prepared for the Federal Geographic Data Committee by the U.S. Geological Survey], 2006, FGDC Digital Cartographic Standard for Geologic Map Symbolization: Reston, Va., Federal Geographic Data Committee Document Number FGDC-STD-013-2006, 290 p., 2 plates.

    GenericPoints
    A point file that provides locations, symbology, and labels for point features other than geochronology, stations, or orientation points. (Source: Alaska Division of Geological & Geophysical Surveys (DGGS).This table is organized according to the NCGMP09 - Draft Standard Format for Digital Publication of Geologic Maps, Version 1.1 by the USGS National Cooperative Geologic Mapping Program (NCGMP).)

    Type
    Type values specify the kind of features represented by a line, point, or polygon (Source: Alaska Division of Geological & Geophysical Surveys)

    Feature type(s): well; Light Oil Stain and/or Strong to Faint Odor; Dark oil stain; Solid HC only

    Symbol
    References the symbol value that was assigned to the point. (Source: Alaska Division of Geological & Geophysical Surveys)

    ValueDefinition
    NULLnot applicable

    Formal codeset
    Codeset Name:FGDC Digital Cartographic Standard for Geologic Map Symbolization; Appendix A. Geologic map symbols, colors, and patterns, "REF NO" field
    Codeset Source:Federal Geographic Data Committee [prepared for the Federal Geographic Data Committee by the U.S. Geological Survey], 2006, FGDC Digital Cartographic Standard for Geologic Map Symbolization: Reston, Va., Federal Geographic Data Committee Document Number FGDC-STD-013-2006, 290 p., 2 plates.

    LocationConfidenceMeters
    Half-width in meters of positional uncertainty envelope; position is relative to other features in the data. A value of -9 indicates that this measure is not available. (Source: Alaska Division of Geological & Geophysical Surveys)

    Data type = integer

    Notes
    Free text for additional information about the polygon. (Source: Alaska Division of Geological & Geophysical Surveys)

    The notes indicate the source of the feature interpretation or provide more information about the feature.

    MapUnit
    Short ASCII string that indicates the map unit. Note: map units in parentheses, such as (Qcf), indicate combined map units consisting of bedrock overlain by thin or discontinuous deposits of the map unit. Map units with a question mark, such as (Qus?), indicate an uncertain identification. (Source: Alaska Division of Geological & Geophysical Surveys)

    ValueDefinition
    KcCanning Formation
    KsSeabee Formation
    KsbuSchrader Bluff Formation, upper
    KtTorok Formation
    TKpcPrince Creek Formation

    GeologicLines
    Dikes, coal seams, ash beds, glacial features, anticline and syncline hinge-surface traces, and other kinds of key beds that do not participate in map-unit topology, NCGMP09 format. (Source: Alaska Division of Geological & Geophysical Surveys (DGGS).This table is organized according to the NCGMP09 - Draft Standard Format for Digital Publication of Geologic Maps, Version 1.1 by the USGS National Cooperative Geologic Mapping Program (NCGMP).)

    Type
    Type values specify the kind of features represented by a line, point, or polygon (Source: Alaska Division of Geological & Geophysical Surveys)

    Feature type(s): concealed anticline hinge trace; concealed syncline hinge trace, seismic data; monocline hinge trace, seismic data; concealed anticline hinge trace, seismic data; concealed asymmetric syncline trace, seismic data; anticline hinge surface trace, seismic data; concealed hinge trace; anticline hinge surface trace; syncline hinge surface trace; plunge direction; syncline hinge surface trace, seismic data; concealed hinge trace, seismic data; small syncline hinge surface trace; overturned syncline hinge trace; concealed syncline hinge trace; overturned anticline hinge trace; monocline hinge surface trace; small scale folds; traceable_bed; oc_approx

    IsConcealed
    This is a flag to identify contacts and faults covered by overlying map units. (Source: Alaska Division of Geological & Geophysical Surveys)

    ValueDefinition
    YThe feature IS covered by an overlying map unit.
    NThe feature IS NOT covered by an overlying map unit.

    LocationConfidenceMeters
    Half-width in meters of positional uncertainty envelope; position is relative to other features in the data. A value of -9 indicates that this measure is not available. (Source: Alaska Division of Geological & Geophysical Surveys)

    Range of values
    Minimum:3
    Maximum:50
    Units:meters

    ExistenceConfidence
    Indicates the degree of confidence and/or certainty in the interpretation of a a feature's existence. (Source: Alaska Division of Geological & Geophysical Surveys)

    ValueDefinition
    certainIndicates that the author has sufficient observational and/or other supporting data to be reasonably confident in the scientific credibility of the interpretation of the feature. The level of certainty is specific to the map scale.

    IdentityConfidence
    Indicates degree of confidence in the identification and classification of the feature. (Source: Alaska Division of Geological & Geophysical Surveys)

    ValueDefinition
    certainIndicates that the author has sufficient observational and/or other supporting data to be reasonably confident in the scientific credibility of the interpretation of the feature. The level of certainty is specific to the map scale.
    unspecifiedThe author has not specified a level of confidence or certainty in the interpretation of the feature.

    Symbol
    References the symbol value that was assigned to the point. (Source: Alaska Division of Geological & Geophysical Surveys)

    Formal codeset
    Codeset Name:FGDC Digital Cartographic Standard for Geologic Map Symbolization; Appendix A. Geologic map symbols, colors, and patterns, "REF NO" field
    Codeset Source:Federal Geographic Data Committee [prepared for the Federal Geographic Data Committee by the U.S. Geological Survey], 2006, FGDC Digital Cartographic Standard for Geologic Map Symbolization: Reston, Va., Federal Geographic Data Committee Document Number FGDC-STD-013-2006, 290 p., 2 plates.

    Notes
    Free text for additional information about the polygon. (Source: Alaska Division of Geological & Geophysical Surveys)

    The notes indicate the source of the feature interpretation or provide more information about the feature.

    MapUnitPolys
    Polygons and associated annotations that record the distribution of mapped or interpreted geologic units, NCGMP09 format. (Source: Alaska Division of Geological & Geophysical Surveys (DGGS)This table is organized according to the NCGMP09 - Draft Standard Format for Digital Publication of Geologic Maps, Version 1.1 by the USGS National Cooperative Geologic Mapping Program (NCGMP).)

    MapUnit
    Short ASCII string that indicates the map unit. Note: map units in parentheses, such as (Qcf), indicate combined map units consisting of bedrock overlain by thin or discontinuous deposits of the map unit. Map units with a question mark, such as (Qus?), indicate an uncertain identification. (Source: Alaska Division of Geological & Geophysical Surveys)

    ValueDefinition
    KcCanning Formation
    KpclPrince Creek Formation, lower
    KsSeabee Formation
    KsbmSchrader Bluff Formation, middle
    KsbuSchrader Bluff Formation, upper
    KtTorok Formation
    QTgdQuaternary drift and colluvium
    QalQuaternary alluvium
    QeQuaternary eolian deposits
    TKpcPrince Creek Formation
    TssSagavanirktok Formation, Sagwon Member
    TswSagavanirktok Formation, White Hills Member

    ColorCMYK
    Provides comma delimited list of CMYK values of the map colors used for a cartographic representations and on the print format map. Note: the percent symbol is inferred, example value: 13, 8, 30, 0. (Source: Alaska Division of Geological & Geophysical Surveys)

    Formal codeset
    Codeset Name:CMYK color model
    Codeset Source:CMYK colors are a combination of the relative percent of CYAN, MAGENTA, YELLOW, and BLACK.

    RuleID
    References the applicable ESRI cartographic representation rule. (Source: Alaska Division of Geological & Geophysical Surveys)

    Data type = integer

    OrientationPoints
    A point file that provides field station locations, symbology, and associated structure data (bedding attitudes, foliation attitudes, slip vectors measured at a point, etc.), NCGMP09 format. (Source: Alaska Division of Geological & Geophysical Surveys (DGGS)This table is organized according to the NCGMP09 - Draft Standard Format for Digital Publication of Geologic Maps, Version 1.1 by the USGS National Cooperative Geologic Mapping Program (NCGMP).)

    Type
    Type values specify the kind of features represented by a line, point, or polygon (Source: Alaska Division of Geological & Geophysical Surveys)

    Feature type(s): inclined bedding; overturned bedding

    StationID
    Identifier assigned by person who originally located station (Source: Alaska Division of Geological & Geophysical Surveys)

    ValueDefinition
    NULLA station number was not recorded or was not assigned.

    Generic example of a DGGS station identifier: YYYYAAA9999X; YY or YYYY= year, AAA=geologist's initials (one to three characters), 9999=unique station number, X= optional alpha character which indicates that multiple samples were collected at a given location or that multiple observations were recorded in the project database. Stations observed by non-DGGS personnel use identifiers from the originating reference.

    Label
    The label values provide text strings to display along with their associated feature. Depending on the context of the feature class, label values will contain applicable FGDCGeoAge font characters, feature labels, dip and plunge values for measured orientations, or other special characters. (Source: Alaska Division of Geological & Geophysical Surveys)

    Formal codeset
    Codeset Name:FGDCGeoAge font
    Codeset Source:Federal Geographic Data Committee [prepared for the Federal Geographic Data Committee by the U.S. Geological Survey], 2006, FGDC Digital Cartographic Standard for Geologic Map Symbolization: Reston, Va., Federal Geographic Data Committee Document Number FGDC-STD-013-2006, 290 p., 2 plates.

    LocationConfidenceMeters
    Half-width in meters of positional uncertainty envelope; position is relative to other features in the data. A value of -9 indicates that this measure is not available. (Source: Alaska Division of Geological & Geophysical Surveys)

    Range of values
    Minimum:3
    Maximum:3
    Units:meters

    Azimuth
    Strike or trend, measured in degrees clockwise from geographic North, using right-hand rule (dip is to right of azimuth direction). Note: Null values not permitted according to the NCGMP09 standard; zero values may indicate that the orientation of the feature was not measured. (Source: Alaska Division of Geological & Geophysical Surveys)

    Range of values
    Minimum:6
    Maximum:347
    Units:degrees

    Inclination
    Dip or plunge, measured in degrees down from horizontal. Note: Null values not permitted according to the NCGMP09 standard; zero values may indicate that the orientation of the feature was not measured. (Source: Alaska Division of Geological & Geophysical Surveys)

    Range of values
    Minimum:2
    Maximum:89
    Units:degrees

    IdentityConfidence
    Indicates degree of confidence in the identification and classification of the feature. (Source: Alaska Division of Geological & Geophysical Surveys)

    ValueDefinition
    certainIndicates that the author has sufficient observational and/or other supporting data to be reasonably confident in the scientific credibility of the interpretation of the feature. The level of certainty is specific to the map scale.

    OrientationConfidenceDegrees
    Estimated circular error, in degrees. For planar features, error in orientation of pole to plane. Note: Null values not permitted according to the NCGMP09 standard; zero values may indicate that the orientation of the feature was not measured. (Source: Alaska Division of Geological & Geophysical Surveys)

    Range of values
    Minimum:5
    Maximum:30
    Units:degrees

    Symbol
    References the symbol value that was assigned to the point. (Source: Alaska Division of Geological & Geophysical Surveys)

    Formal codeset
    Codeset Name:FGDC Digital Cartographic Standard for Geologic Map Symbolization; Appendix A. Geologic map symbols, colors, and patterns, "REF NO" field
    Codeset Source:Federal Geographic Data Committee [prepared for the Federal Geographic Data Committee by the U.S. Geological Survey], 2006, FGDC Digital Cartographic Standard for Geologic Map Symbolization: Reston, Va., Federal Geographic Data Committee Document Number FGDC-STD-013-2006, 290 p., 2 plates.

    MapUnit
    Short ASCII string that indicates the map unit. Note: map units in parentheses, such as (Qcf), indicate combined map units consisting of bedrock overlain by thin or discontinuous deposits of the map unit. Map units with a question mark, such as (Qus?), indicate an uncertain identification. (Source: Alaska Division of Geological & Geophysical Surveys)

    ValueDefinition
    KcCanning Formation
    KpclPrince Creek Formation, lower
    KsSeabee Formation
    KsbmSchrader Bluff Formation, middle
    KsbuSchrader Bluff Formation, upper
    KtTorok Formation
    TKpcPrince Creek Formation
    TssSagavanirktok Formation, Sagwon Member


Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)

  2. Who also contributed to the data set?

    We dedicate this map to the late Rocky Reifenstuhl, whose countless mapping traverses contributed significantly to our present understanding of North Slope geology. We trust the many stories of his legendary energy will continue to inspire the next generation of Alaska geologists. He is greatly missed. Outcrop stratigraphic work by David LePain and Russ Kirkham contributed to our understanding key stratigraphic relationships in the map area. Valuable discussions with a number of colleagues greatly helped refine our views of the local and regional geology, including David LePain, David Houseknecht, Wesley Wallace, Peter Flaig, Dolores Van der Kolk, Dick Garrard, and Gregory Wilson. University of Alaska Fairbanks students Steve Polkowski, Dolores Van der Kolk, Jake Mongrain, and Peter Flaig all helped with field logistics at some point in the project. We thank Dick Garrard for persistently pushing us forward toward completion of this map, Greg Wilson and Wes Wallace for timely and thoughtful reviews, and Gil Mull for impressing upon us the potential stratigraphic importance of the area and for many insightful conversations and suggestions while planning the mapping project and when considering the final version of the map. Helicopter pilot Tom "Rat" Ratledge expertly transported us throughout the map area and back to camp safely, often pointing out an unnoticed outcrop in the process. Completion of the map was made possible by funding from a variety of sources, including operating and capital improvement project funds from the State of Alaska (Division of Geological & Geophysical Surveys and Division of Oil & Gas), and the STATEMAP program of the National Cooperative Geologic Mapping Program administered by the U.S. Geological Survey (award 08HQAG0051). Fieldwork was also supported by substantial contributions from companies involved in the Alaska oil and gas industry. Recent sponsors (2007 and 2008) included Anadarko Petroleum Corp., BG Alaska, BP, Chevron, ConocoPhillips Alaska Inc., ENI, Petro-Canada, Pioneer Natural Resources, Repsol YPF Exploration and Production Co., Shell International Exploration and Production Co., and Talisman Energy Inc.

  3. To whom should users address questions about the data?

    Alaska Division of Geological & Geophysical Surveys
    Metadata Manager
    3354 College Road
    Fairbanks, AK 99709-3707
    USA

    (907)451-5039 (voice)
    (907)451-5050 (FAX)
    dggspubs@alaska.gov

    Hours_of_Service: 8 am to 4:30 pm, Monday through Friday, except State holidays


Why was the data set created?

Alaska's North Slope is largely covered by tundra and past exploration has relied heavily on expensive seismic data. The geology exposed along the northern mountain front provides much-needed insight into the evolution of the petroleum system. Many of the geologic relationships delimited by our mapping can be projected into the subsurface and are directly relevant to ongoing exploration. This study presents new findings pertinent to evaluating the resource potential of the gas-prone, south-central Sagavanirktok Quadrangle region. In addition to relevant oil and gas issues, detailed geologic mapping in the Sagavanirktok River investigates several important scientific questions related to deposition of the Brookian Megasequence and evolution of the Colville foreland basin.


How was the data set created?

  1. From what previous works were the data drawn?

  2. How were the data generated, processed, and modified?

    Date: 2008 (process 1 of 3)
    Geologic unit interpretation - During the summer 2008 field season, rock unit identification, bedding attitudes, structural observations, hydrocarbon indications, and analytical data from samples collected at field stations were used to ground-truth and refine preliminary geologic interpretations based in part on subsurface data. Approximately 420 line km (260 line mi) of proprietary two-dimensional (2-D) seismic reflection data through the map area (seven dip lines and three strike lines) were interpreted by P.L. Decker prior to 2008 field activities, integrating available surface information and subsurface correlations in the Lupine Unit 1, Aufeis Unit 1, Ivishak Unit 1, and Echooka Unit 1 wells in the map area and the Susie Unit 1, Nora Federal 1, and Bush Federal 1 wells nearby to the north (figs. 2 and 3). The seismic data constrained the continuity and plunge of major structures and in projecting lithologic and structural contacts into areas of significant Quaternary cover where surface constraints were limited or lacking. Rubble traces and traceable beds evident from aerial photography and topography helped define folds and other structure and contributed to the map interpretation in areas of little or no intact bedrock outcrop. In most cases, rubble traces were visited to confirm formation assignments and all interpretations were reconciled with available subsurface information. Generalized Quaternary units were mapped only in larger river drainages and areas of thick Quaternary cover where the subcropping units could not be confidently identified. Therefore, the distribution of bedrock as mapped intentionally over-represents the amount of bedrock encountered in the field to more clearly display regional-scale stratigraphic and structural relationships.

    Date: 2014 (process 2 of 3)
    Technical review - This is a final report of scientific research. It has received technical review and editing by several scientists familiar with the subject matter. We incorporated the reviewers' suggestions into the final draft when deemed appropriate.

    Date: 2016 (process 3 of 3)
    GIS analysis and digital cartography - The geologic and geographic features portrayed in this data distribution package were attributed according to the NCGMP09 geodatabase standard.

  3. What similar or related data should the user be aware of?

    Hubbard, T.D., 2016, Surficial-geologic map of parts of the Sagavanirktok and Toolik river drainages, northern Brooks Range foothills, Alaska: Report of Investigation RI 2016-6, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 1 sheet, scale 1:63,360
    Loveland, A.M., Gillis, R.J., Decker, P.L., Wartes, M.A., and Hubbard, T.D., 2009, Geologic map of the South-central Sagavanirktok Quadrangle, North Slope, Alaska (poster): Alaska Geological Society Technical Conference, Fairbanks, Alaska, April 24, 2009: Poster and Presentation Loveland, A.M. and others, 2009, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 1 sheet


How reliable are the data; what problems remain in the data set?

  1. How well have the observations been checked?

    Certainty in attribute interpretation varies throughout the map. Attribute fields within each table record the author's degree of confidence in the existence or identity of applicable features. This publication is a final report of research and has received two technical reviews as well as technical editing.

  2. How accurate are the geographic locations?

    Certainty in feature boundaries or location varies throughout the map. Data fields within each table record the author's degree of confidence in the location of applicable features.

  3. How accurate are the heights or depths?

  4. Where are the gaps in the data? What is missing?

    This DGGS Report of Investigations is a final report of scientific research. It has received technical review and may be cited as an agency publication.

  5. How consistent are the relationships among the observations, including topology?

    Polygon topology is present and clean on the original geospatial dataset. All polygon features were topologically validated using ArcGIS prior to export to shapefile format.


How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?

Access_Constraints:
This report, map, and/or dataset is available directly from the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys (see contact information below).
Use_Constraints:
Any hard copies or published datasets utilizing these datasets shall clearly indicate their source. If the user has modified the data in any way, the user is obligated to describe the types of modifications the user has made. The user specifically agrees not to misrepresent these datasets, nor to imply that changes made by the user were approved by the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys. The State of Alaska makes no express or implied warranties (including warranties for merchantability and fitness) with respect to the character, functions, or capabilities of the electronic data or products or their appropriateness for any user's purposes. In no event will the State of Alaska be liable for any incidental, indirect, special, consequential, or other damages suffered by the user or any other person or entity whether from the use of the electronic services or products or any failure thereof or otherwise. In no event will the State of Alaska's liability to the Requestor or anyone else exceed the fee paid for the electronic service or product.

  1. Who distributes the data set? (Distributor 1 of 1)

    Alaska Division of Geological & Geophysical Surveys
    Metadata Manager
    3354 College Road
    Fairbanks, AK 99709-3707
    USA

    (907)451-5039 (voice)
    (907)451-5050 (FAX)
    dggspubs@alaska.gov

    Hours_of_Service: 8 am to 4:30 pm, Monday through Friday, except State holidays
  2. What's the catalog number I need to order this data set?

    RI 2014-4

  3. What legal disclaimers am I supposed to read?

    The State of Alaska makes no expressed or implied warranties (including warranties for merchantability and fitness) with respect to the character, functions, or capabilities of the electronic data or products or their appropriateness for any user's purposes. In no event will the State of Alaska be liable for any incidental, indirect, special, consequential, or other damages suffered by the user or any other person or entity whether from the use of the electronic services or products or any failure thereof or otherwise. In no event will the State of Alaska's liability to the Requestor or anyone else exceed the fee paid for the electronic service or product.

  4. How can I download or order the data?


Who wrote the metadata?

Dates:
Last modified: 31-Mar-2017
Metadata author:
Alaska Division of Geological & Geophysical Surveys
Metadata Manager
3354 College Road
Fairbanks, AK 99709-3707
USA

(907)451-5039 (voice)
(907)451-5050 (FAX)
dggspubs@alaska.gov

Hours_of_Service: 8 am to 4:30 pm, Monday through Friday, except State holidays
Metadata standard:
FGDC Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)
Metadata extensions used:


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